55425630153640 has 128 divisors (see below), whose sum is σ = 131430601451520. Its totient is φ = 20995348000000.

The previous prime is 55425630153599. The next prime is 55425630153671. The reversal of 55425630153640 is 4635103652455.

It is a super-2 number, since 2×55425630153640² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37845015 + ... + 39282265.

It is an arithmetic number, because the mean of its divisors is an integer number (1026801573840).

Almost surely, 2^{55425630153640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55425630153640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65715300725760).

55425630153640 is an abundant number, since it is smaller than the sum of its proper divisors (76004971297880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55425630153640 is a wasteful number, since it uses less digits than its factorization.

55425630153640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437703 (or 1437699 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 49.

The spelling of 55425630153640 in words is "fifty-five trillion, four hundred twenty-five billion, six hundred thirty million, one hundred fifty-three thousand, six hundred forty".